Page 527 - 2018_IFC

PYROPHORIC MATERIALS

with openings protected in accordance with the Interna- SECTION 6405
tional Building Code. USE
Exception: Storage in approved hazardous materials 6405.1 General. The use of pyrophoric materials in amounts
storage cabinets constructed in accordance with Section exceeding the maximum allowable quantity per control area
5003.8.7. indicated in Table 5003.1.1(1) or 5003.1.1(3) shall be in
accordance with Sections 5001, 5003, 5005 and this chapter.
6404.2 Outdoor storage. Outdoor storage of pyrophoric
materials in amounts exceeding the maximum allowable 6405.2 Weather protection. Where overhead construction is
quantity per control area indicated in Table 5003.1.1(3) shall provided for sheltering of outdoor use areas of pyrophoric
be in accordance with Sections 5001, 5003 and 5004, and this materials, the use areas shall be provided with approved auto-
chapter. matic fire-extinguishing system protection.
The storage of silane gas, and gas mixtures with a silane 6405.3 Silane gas. The use of silane gas, and gas mixtures
concentration of 1.37 percent or more by volume, shall be in with a silane concentration of 1.37 percent or more by vol-
accordance with CGA G-13. ume, shall be in accordance with CGA G-13.
6404.2.1 Distance from storage to exposures. The sepa-
ration of pyrophoric solids, liquids and gases from build-
ings, lot lines, public streets, public alleys, public ways or
means of egress shall be in accordance with the following:
1. Solids and liquids. Two times the separation
required by Chapter 57 for Class IB flammable liq-
uids.
2. Gases. The location and maximum amount of pyro-
phoric gas per storage area shall be in accordance
with Table 6404.2.1.
6404.2.2 Weather protection. Where overhead construc-
tion is provided for sheltering outdoor storage areas of
pyrophoric materials, the storage areas shall be provided
with approved automatic fire-extinguishing system protec-
tion.

TABLE 6404.2.1
PYROPHORIC GASES—DISTANCE FROM STORAGE TO EXPOSURES a
MINIMUM MINIMUM DISTANCE MINIMUM DISTANCE MINIMUM DISTANCE TO BUILDINGS ON THE SAME PROPERTY
MAXIMUM TO PUBLIC
AMOUNT PER DISTANCE TO LOT LINES OF STREETS, PUBLIC Nonrated Two-hour Four-hour
PROPERTY THAT
BETWEEN
STORAGE AREA STORAGE AREAS CAN BE BUILT UPON ALLEYS OR PUBLIC construction or construction and no construction and no
(cubic feet) WAYS openings within openings within openings within
(feet) (feet) 25 feet 25 feet 25 feet
(feet)
250 5 25 5 5 0 0
2,500 10 50 10 10 5 0
7,500 20 100 20 20 10 0
3
For SI: 1 foot = 304.8 mm, 1 cubic foot = 0.02832 m .
a. The minimum required distances shall be reduced to 5 feet where protective structures having a minimum fire resistance of 2 hours interrupt the line of sight
between the container and the exposure. The protective structure shall be not less than 5 feet from the exposure. The configuration of the protective structure
shall allow natural ventilation to prevent the accumulation of hazardous gas concentrations.

494 2018 INTERNATIONAL FIRE CODE ®
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